package com.zsn.demo.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @author zhushuainan
 * @title: ExecutorConfig
 * @projectName excelDemo
 * @description: TODO
 * @date 2022/11/9 10:18
 */
@Configuration
@EnableAsync
public class ExecutorConfig {

    @Bean
    public Executor asyncServiceExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();

//配置核心线程数

        executor.setCorePoolSize(5);

//配置最大线程数

        executor.setMaxPoolSize(8);

//配置队列大小

        executor.setQueueCapacity(400);

//配置线程池中的线程的名称前缀

        executor.setThreadNamePrefix("thread-");

// rejection-policy：当pool已经达到max size的时候，如何处理新任务

// CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行

        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());

//执行初始化

        executor.initialize();

        return executor;

    }
}
